How To Calculate RAID 5 Storage?

How much RAID 5 storage do I need if according to our calculator we need a total of 440TB for surveillance storage?

How to calculate RAID 5 storage requirement?

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*******,

*** *****, *** *** **** ** *** *** *** **** Group **** ****** **% *** ******* ********. * **** ***** typically ******** ** *** ** *** **** ****** **** *** parity *****(*) ** *** **** ******* *** ***** *** ********* where * **** ******* ** ***** **** ******** **** ******.

**, ***'* ****** **** **** ***** **** ** ***** ***** and *** ******** **** **** *** ****** ** *** ***** Group (********* * ******'* ********* - **** ** **** *****). 15 ****** ***** ** **** *** *** **** ***** ** the ****** *****. ** *** ****** *** ***, *** ***** have ****=***.*=**** *** ** ******* **** **** **** ***.

*** * ***** *** ********* ***** *** *****-***** ***** *******, nor ***** * ********* ******* ** ****** ** *** **** Group; ********** **** ****-****** ******. * ***** ********* ** ***** RAID6 ******* *** **** ****** ** * **** ***** *** the ****** *** ******, *** **** ****** *** **** **** storage ******** ****** ** **** (************* **** ******) ****** ********, which **** **** *** ** *** **** ** **** **** Group. * ***** **** ***** **** *** ****** *** **** drives, *** ******* *** ****** **** ****** **** * **** Group.

**** ***** ********* ********* **** ****** ** ****-** ** ****-** bits. *** ** ****-** **** ** **** ** ****** ****-**, which ** ******* ****** ***** ** *** *** ** **-** HDD ***** ****. **** ***** ****, *** **** ** * fact ** ****. ** **** *** *** ***** ** ******** or ** *** ****** ******** ** ***** *** ****** *** spare *** *******, *** **** **** ******* ** *********** *** data ** *** ******* ***** **** *** ****** **** **** is ****** *** ** *** ** *** ******. ** **** dense * ****** (** ******), ***** ** * ****** ********** that ** ***** *** ***** ** ****** **** **** ** unreadable. ** **** *******, ******* **** **** *** *** ****** RAID ***** **** ** ****.

****, *** ****** *** **** *****, *** ****** ******** ****. Rebuild **** ** *** **** ********* *** * ******* ****** since *** ****** ** ******* *** ******* **** ****** **** while ******* *** ***** ****.

* ********* ********* ***** ******* **** ** **** **** "**+*" drives *** *** *** ***** *** *******. ** ******, **** doesn't *** ** **** **-***** ******* ** * ****** **** compromise ***** ** ** **** ******, * ****** ****** *** 1 *** ***** ***** *** **-*** *******. **** *** ******, that ***** *** ****=***.*=**** *** ******* *** *******.

*** ****.....***** * ****** **** ******? * ***** *** ****** to ******* * *******!

*** **** **** * ******* ** * **** ** ********* to *** ********** ** **** * ***** ** ***** *** surveillance *******?

***** ** ****'* ********** ** * ** ****** *** *** RAID ***** *** ** ***** *******, ****'* *** **** ***** RAID ******* **** *** **** **** ***** **** * *** 6, **** *** ******* *** ******.

  • **** * ** ****, * ******, * ***** = * groups=8 ****** + * ******=****=*****
  • **** *, ** ****, * ******, * ***** = * groups=8 ****** + * ******=****=*****
  • **** *, ** ****, * ******, * ***** = * groups=16 ****** + * ******=****=*****
  • **** *, ** ****, * ******, * ***** = * groups=18 ****** + * ******=*****=*****

***** **** **** ****running **** * ** *** ********* with the advent of large capacity drives, I included just so you could see the delta. As for spares, they are optional. They let the rebuild process start immediately, which can be important if there is no IT support. Maybe Carl would offer an opinion on whether he sees hot spares in every chassis as critical...

'*',

* ********* ******'* *** * ****** ** ******* ** ***** one ****** ***** *** **** ******* ** *** ***** *** RAID *****, *** ****'* **. ***, ** ** ** ******** necessity **** ***** *** ***** ***** *** ******** *** ****** drives ******* ****** ****, *'** **** ** ******* **** ****. It ******* ** *** **** * ****** ***** **** *** replaced.

*** ****** **** *+* ***** ******* *** ****** **** * hot ***** *** **** **** ***** ** **** ****** **-*** chassis, *** **** *** ********* * *** ** ****** **. So **** **** ** ** ****** ** * **** ******, 2 ****** ****** *** * *** *****. *** ********** ******* I *** **** *** ** ********.

** *** ** *** ******** ****** ** * ******* *******, using ********** **-*** *****. **** ******* *** * **** ****** of **+* *** *+* **** * ****** *** ***** *** each *******. *** ****** ****** ** *** **-*** ***** ***** set ** ** ***** ** * ****** **+* **** ***** per ******* **** *** *** *****. ** **** **** ** least * ***** ** * ***** ** **** ** ******** the ******** ** ****, ** *** *** *** ******* ** as *********. ** *** * ***** ** *** **** **** configuration, ** ***** **** *** ****.

*******,

** ****** *** ***** *** ** ********* *** **** **** you **** ** ********* *** '******' ***** ***** ** **** OS ********* *****.

** ****** ********** **** * **** *** ***** ***** *** is ****...****** ***** **** ****.

*** ****'* ********* ****** ** ********* *** ** ********** ***** up *** ******* **** ********. **** ** ** **** ********* up *****..***... *** ********* **** ** ** **** * **** optimal ******** ** *********** *** *** **** **** ****? **** is *** ******** *** *** ******** **** ****** *** ***... but ** **** ** ******** ******* * ****** ********.

****....? ***** ** ****** **** ***? ** *** ****** ** recover *** **** ******* * ******* *** * ***** *'** buy * ****** ******..!

****** ** ***'** *** ** ** ****.

**** ********, ***** ********. *****

****://*********.**********.***/*****/******-***-***-****-**-***-***-********-**-******-*******

***** *******. **** */* **** *** ***** ****** **** ** the "*****" *****. *** ****** ** *********** ****** *** ******. When *********** *****,, *** ******** ** ** ** ******, *** the ****** ** *** ****** ** **** *****.

* **** **** ** ********* **** ** ***** ***** (** more) ** ********* *** **** ** *** ***** ** *** server ****, ** **** ** ***** ** * *******, ** can ** ******** ****, ******* ****** ** ***** ***** ******* the ***** ******, ****** ** ******* **, *** ******* ** in ****.

***** ** * **** ** ** ******* ** *** ********** between ***** ************ ******* ***** ** ***** ***** ** *,***,*** bytes *** ******** & ******** ****** ******** ************ ***** ** 1,048,576 ***** *** ********. ** * *** ******* ***** ***** actually ****** **** *.**** ** ****** ********** ****.

**** *********** *** ******* *****, **** **** ** ** ***** of ******* *** ***** ******* *********** ** * ******* ** binary ***** ******. ****** ***** **** ** ***** *.**% ** storage ** ****** ** ***** *** **********.

** * *** ******* ***** ***** ******** ****** **** *.**** of ****** ********** ****.

** ** ***** ** **** ***** ***** *,***,***,***,*** *****.

*** *** **** *** ** ******* ** ** ***** ***** of **, **, ** ** ** ** **** **** **** since ** (** *** ** **** **) = ****, *** a ** = ********* *** ** **. *** ***** *** technicallyKiB, ***, ***, ***.

** *** ***** **** ******* ********* **reported ***** ***** *** **/***, which is 1,000,000 bits per second. So when doing these types of capacity calculations, where you are buying new drives, you should not need to convert between the two types of TBs. Just stick with all zeroes.

**** *** ** ***** *** **** *** ** ** **** though, ****'* **** *** **** ** ******* **** ****** ** compare ********* ******* **** *******.

****** ***** **** ** ***** *.**% ** ******* ** ****** to ***** *** **********.

This ** **** **** *** **, each unit is off by a increasing percentage. I would instead recommend using a calculator like Mike D. links to above.